This side notched , triangular arrow point has straight sides to slightly concave basal edges. A few may have slightly convex basal edges. In a addition to the side notches on the blade, usually just above the primary side notches, or it may be serrated. Points with two or three notches are the most common. The Cahokia point was named by Edward G. Scully {1951 :15 } for examples found at the Cahokia site in St. Clair and Madison counties in Illinois. An early Mississippian point dating in the A.D. 900 to A.D. 1300 range.